var ul=document.querySelector("#no1-img");
var dian=document.querySelectorAll(".lunbotu>li");
var col=document.querySelector(".col");
console.log(dian);
for(var i=0;i<dian.length;i++){
	dian[i].index=i;
	dian[i].addEventListener("click",function(){
		for(var j=0;j<dian.length;j++){
			dian[j].className="";
		}
		
		this.className="col"
	ul.style.transform="translateX("+(this.index*33.33*-1)+"%)"
})
}
